单项选择题

When ______ through a circuit, the current will lose part of its energy.

A．flowing
B．being flowed
C．flowed
D．having flown
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单项选择题
You won't know if it fits you until you ______ it on.
A．will try
B．are trying
C．are to try
D．have tried
单项选择题
We can ______ with eight computers in the lab at the moment, but we'll need a couple more when the new staff arrive.
A．get by
B．get across
C．get through
D．get put down
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